Get That Battery Changed ASAP! Watch Batteries these days are great! They can keep your watch ticking a long time - about two to five years depending on the watch and how much energy it needs. But, like all batteries, they eventually run out of juice, and need to be changed. Waiting too long to replace a dead or slowing battery is a big mistake, since dead batteries can end up causing problems to the movement of the second and minute hands. Once you notice a weakening battery, send it to us immediately because, it needs just as much care as other more specialized repairs, and we have both the expert tools and the expertise to get the job done right.